Tier1 Replacement for 3M 15x9x1 FAPF01 FAPF02 Ultra Clean Air Purifier Filter 4 Pack Fits into 3M Filtrete FAP02-RS Ultra Clean and FAP01-RS Ultra Quiet Air Purifiers Cost-effective alternative to the expensive OEM filter Actual Size: 9 inches (width) x 15 inches (height) x 3/4 inches (thickness) Merv 8 Replacement for the 3M Filtrete FAPF01 & FAPF02 Air Purifier Filters